The Younger Dryas Impact Hypothesis debate continues with papers that are published both supporting and disputing it. The debate is a binary one with one side either denying or supporting an extreme event capable of causing extinction and climatic change. The ambiguous and inconsistent nature of the hypothesized impact signals might be used to argue for a third possibility. This possibility is that the consequence of either a rather minor extraterrestrial event or set of rather minor extraterrestrial events have been grossly overinterpreted and exaggerated as being larger than they were because by random coincidence they occurred at the same time as a major paleoclimatic change.
Some of the recent papers are: Huber, R., Darga, R. and Lauterbach, H., 2017, April. Pseudoimpactites in anthropocenically overprinted quaternary sediments. In EGU General Assembly Conference Abstracts Vol. 19, p. 16545 http://www.rimbao.de/egu2017/Poster_EGU_2017_Pseudoimpaktites.pdf Israde-Alcántara, I., Domínguez-Vázquez, G., Gonzalez, S., Bischoff, J., West, A. and Huddart, D., 2017. Five Younger Dryas Black Mats in Mexico and their stratigraphic and paleoenvironmental context. Journal of Paleolimnology, pp. 1-21. Mahaney, W.C., Somelar, P., West, A., Krinsley, D., Allen, C.C., Pentlavalli, P., Young, J.M., Dohm, J.M., LeCompte, M., Kelleher, B. and Jordan, S.F., 2017. Evidence for cosmic airburst in the Western Alps archived in Late Glacial paleosols. Quaternary International, 438, pp. 68-80. Moore, C.R., West, A., LeCompte, M.A., Brooks, M.J., Daniel Jr, I.R., Goodyear, A.C., Ferguson, T.A., Ivester, A.H., Feathers, J.K., Kennett, J.P. and Tankersley, K.B., 2017. Widespread platinum anomaly documented at the Younger Dryas onset in North American sedimentary sequences. Scientific Reports, 7, article 44031. Roperch, P., Gattacceca, J., Valenzuela, M., Devouard, B., Lorand, J.P., Arriagada, C., Rochette, P., Latorre, C. and Beck, P., 2017. Surface vitrification caused by natural fires in Late Pleistocene wetlands of the Atacama Desert. Earth and Planetary Science Letters, 469, pp. 15-26. Seo, J., Han, C., Steffensen, J.P., Hong, S. and Sharma, M., 2017, March. Osmium Isotopes at the Onset of Younger Dryas Using the GRIP Ice Core. In Lunar and Planetary Science Conference. Vol. 48, abstract 3005. Scott, A.C., Hardiman, M., Pinter, N., Anderson, R.S., Daulton, T.L., Ejarque, A., Finch, P. and Carter - champion, A., 2017. Interpreting palaeofire evidence from fluvial sediments: a case study from Santa Rosa Island, California, with implications for the Younger Dryas Impact Hypothesis. Journal of Quaternary Science, 32(1), pp. 35-47. Schumann, R.R., Pigati, J.S. and McGeehin, J.P., 2016. Fluvial system response to late Pleistocene- Holocene sea-level change on Santa Rosa Island, Channel Islands National Park, California. Geomorphology, 268, pp. 322-340. (Comment) - Pinter, N., Hardiman, M., Scott, A.C. and Anderson, R.S., 2017. Discussion of “Fluvial system response to late Pleistocene-Holocene sea-level change on Santa Rosa Island, Channel Islands National Park, California”(Schumann et al., 2016. Geomorphology, 268: 322–340). Geomorphology. (Reply) - Schumann, R.R. and Pigati, J.S., 2017. Reply to the discussion of Pinter et al. on ‘Fluvial system response to late Pleistocene-Holocene sea-level change on Santa Rosa Island, Channel Islands National Park, California’ by Schumann et al.(2016). Geomorphology. Zamora, A., 2017. A model for the geomorphology of the Carolina Bays. Geomorphology, 282, pp. 209-216. As usual, the “impact cratering bandwagon” that Reimold (1997) talks about is alive and well as part of the Younger Dryas Impact Hypothesis discussion. This is seen in the number of imaginary impact craters and structures that have been offered as evidence of this event and an earlier Pleistocene hypothesized impact event. The latest of these imaginary craters is discussed in: Burchard, H.G., 2017. Younger Dryas Comet 12,900 BP. Open Journal of Geology, 7(02), p.193. (Note:, the “Open Journal of Geology is published by “Scientific Research Publishing.” Go see: https://en.wikipedia.org/wiki/Scientific_Research_Publishing Their evidence also includes a few real pre-Pleistocene craters and structures. Also, authors and podcasters of fringe science in their zeal to find evidence for a catastrophic Younger Dryas impact event repeatedly have mistakenly and incorrectly presumed that events associated with the Missoula Floods and various meltwater events and pulses were contemporaneous with the start of the Younger Dryas. Some blatant errors are repeatedly made despite an abundant data that these events are quite obviously not contemporaneous. One of the more bizarre of these ill-informed and unsupported interpretations is the claim that the Palouse Loess consists of some type of Younger Dryas Impact ejecta-like deposit. References cited: Reimold, W.U., 2007. The impact crater bandwagon (some problems with the terrestrial impact cratering record). Meteoritics & Planetary Science, 42(9), pp. 1467-1472. Yours, Paul H. ______________________________________________ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteoriteemail@example.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list